EP1954100B1 - Porte pour four à micro-ondes - Google Patents

Porte pour four à micro-ondes Download PDF

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Publication number
EP1954100B1
EP1954100B1 EP08153298A EP08153298A EP1954100B1 EP 1954100 B1 EP1954100 B1 EP 1954100B1 EP 08153298 A EP08153298 A EP 08153298A EP 08153298 A EP08153298 A EP 08153298A EP 1954100 B1 EP1954100 B1 EP 1954100B1
Authority
EP
European Patent Office
Prior art keywords
door
microwave oven
contact part
panel
door panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP08153298A
Other languages
German (de)
English (en)
Other versions
EP1954100A1 (fr
Inventor
Seung Ryong Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020020013058A external-priority patent/KR100807383B1/ko
Priority claimed from KR10-2002-0014212A external-priority patent/KR100420353B1/ko
Priority claimed from KR10-2002-0014210A external-priority patent/KR100437404B1/ko
Priority claimed from KR10-2002-0022546A external-priority patent/KR100437416B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1954100A1 publication Critical patent/EP1954100A1/fr
Application granted granted Critical
Publication of EP1954100B1 publication Critical patent/EP1954100B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6435—Aspects relating to the user interface of the microwave heating apparatus
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6414—Aspects relating to the door of the microwave heating apparatus

Definitions

  • the present invention relates to a microwave oven, and more particularly, to a door unit for selectively closing a front surface of a microwave oven.
  • microwave ovens such as those illustrated in Figure 1 include a door 2 arranged on a front surface of the microwave oven body 1. Using a door handle 3, the door 2 may be used to open and close a cooking chamber provided within the body 1. Microwaves may be generated by various electrical devices accommodated in a device chamber provided in one side of the microwave oven body I and behind the controller 5.
  • the controller 5 further includes a control panel 6 example, a display portion 7a provided as a pass-through hole, a key portion 12 including a plurality of operation keys, operating buttons 13 and 13a, and the like.
  • a key pad 11 is provided at a front surface of pass-through hole 7a and a display cover 8 is provided at a rear surface of pass-through hole 7a.
  • both the key pad 1 1 and display cover 8 are formed of a transparent material
  • a substrate 10a is provided behind the control panel 6, opposite the pass-through hole 7a, and supports a display 10 (e.g., LED, LCD, VFD, etc.).
  • a display 10 e.g., LED, LCD, VFD, etc.
  • a gap is formed between the two components. Accordingly, a display holder 9 may be arranged between the display cover 8 and the display 10 to fill a space created by the gap.
  • controller 5 is provided on one side of the microwave oven and in front of the device chamber.
  • a portion of device chamber located between the various electrical devices and the controller 5 is inefficiently used and a portion of the front surface of the microwave body 1 is dedicated to the controller 5.
  • the controller 5 since the controller 5 is provided in front the device chamber, a user may operate the operation buttons 13 or the key part 12 when door 2 is opened. If a sensing device, capable of sensing whether the door 2 is open or closed, is out of order, a safety issue arises in that the open microwave oven may be operated by the user.
  • JP 2000-012209A discloses a microwave oven with a control unit including a variety of key devices for controlling the operation of the microwave oven.
  • the control unit is mounted to an opening of a door unit from an outside and is arranged at a lower portion of the door.
  • JP 01-189422A discloses an other microwave oven with an operation panel mounted on a door unit.
  • It an object of the invention to provide a door unit for a microwave oven which permits an efficient use of a space of the microwave oven.
  • the door unit includes a door frame, wherein the door frame defines an exterior shape of the door, and a door panel arranged behind the door frame, wherein the control unit is arranged on the door panel.
  • An opening which preferably has an inner perimeter contact part extended in front and rear directions, is provided in a predetermined portion of the door frame, wherein a portion of the door panel is exposed through the opening in the door frame.
  • the door panel includes a projection provided within the opening, wherein the projection couples the door panel to the door fame.
  • the projection on the door panel includes an outer perimeter contact part that corresponds to the inner perimeter contact part.
  • the inner perimeter contact part of the opening includes a contact part that may contact the outer perimeter contact part.
  • a stepped part may be arranged behind the inner perimeter contact part to form a gap with the outer perimeter contact part.
  • the door panel may include a protruding support part arranged behind the outer perimeter contact part, wherein the protruding support part may support a rear end of the stepped part of the door frame.
  • the door panel may further include at least one joining rib, wherein the inner perimeter contact part may be inserted between the outer perimeter contact part and the joining rib.
  • the door panel may include a seat, wherein the control unit may be arranged on the seat, a display portion for displaying information, and a back surface.
  • the operation panel provided with a plurality of buttons allowing a user to operate the microwave oven, may be supported by a front surface of the seat.
  • a substrate provided with a plurality of components enabling operation of the plurality of buttons and the display portion, may be supported on the back surface of the scat.
  • the foregoing door for a microwave oven of the present invention permits more effective use of a space of the microwave oven, and prevent wrong operation of the microwave oven.
  • FIG 3 illustrates a perspective view of a microwave oven in accordance with an embodiment of the present invention.
  • Figure 4 illustrates an exploded perspective view of the microwave oven shown in Figure 3 .
  • a cooking chamber 32 is arranged within a cavity assembly 30 serving as a frame of the microwave oven and an electrical device chamber 31 is arranged adjacent the cooking chamber 32.
  • An object e.g., food
  • the various electrical devices may include, for example, a magnetron 28 for generating microwaves, a high-voltage transformer 26 for supplying high voltage to the magnetron 28, a fan 29 for generating an air flow inside the electrical device chamber 31 thereby cooling the various electrical devices as they may become heated.
  • a device substrate 31a may also be provided within the electrical device chamber 31.
  • a base plate 34 may be arranged at a bottom surface of the cavity assembly 30.
  • An outer case 33 may cover the cavity assembly 30 and the electrical device chamber 31, thereby forming outside top and side exterior surfaces of the microwave oven.
  • Cooking chamber 32 may be opened or closed via door 50 attached to the microwave oven via hinge plate 30a.
  • the cooking chamber 32 may be closed when door 50 contacts a front surface of the cavity assembly 30.
  • a user may open or close the cooking chamber 32 using a door handle 52 provided on the door 50.
  • the door includes a control unit and a door unit, wherein the control unit transmits signals capable of operating the microwave oven (e.g., to produce microwaves at a predetermined power level for a predetermined amount of time) and displays the operational status of the microwave oven.
  • the door unit includes a door frame 53 forming the exterior surface of the door 50, and a door panel 55 arranged behind the door frame 53.
  • the control unit 60 is be provided on the door 50 via door panel 55.
  • the door panel 55 may be formed of a transparent material (e.g., transparent plastic) to enable a user to view the interior of the cooking chamber 32 from outside the microwave oven.
  • a transparent material e.g., transparent plastic
  • the control unit 60 is provided at a predetermined position (e.g., an upper portion) on the door panel 55 and includes an operation panel 62 and a substrate 65.
  • the operation panel 62 may, for example, include a display portion 63, a plurality of buttons 62a enabling a user to operate the microwave oven, and a flexible cable 64 for transmitting signals between the buttons 62a and a plurality of components supported by substrate 65.
  • Substrate 65 may, for example, support a display 66 for displaying information within the display portion 63, connectors 67 for electrically connecting to the flexible cable 64, and a connection cable 68 for electrically connecting the control unit 60 to the components in the electrical device chamber 31.
  • Control unit 60 may be seated on the door panel 55 via a seat 56.
  • Seat 56 may be laterally arranged in, and project outwardly from, an upper portion of the door panel 55.
  • a display portion pass-through hole 56h may be centrally arranged within seat 56 and a cable slot 56s may be arranged at a side portion of seat 56.
  • the operation panel 62 may be arranged on a front surface of seat 56, while the substrate 65 may be arranged on a rear surface of the seat 56-
  • the location of the display portion 63 on the operation panel 62 corresponds to the location of the display portion pass-through hole 56h and the flexible cable 64 may extend through the cable slot 56s toward the back of the door panel 55 and connect to the connector 67 of substrate 65.
  • control unit 60 since control unit 60 is arranged on the door 50, space located in a front portion of the electrical device chamber may be used for purposes generally not recognized by microwave ovens such as those illustrated in Figures 1 and 2 .
  • devices other than those used in the heating of objects with microwaves may be provided within the front portion of the electrical device chamber.
  • Devices such as toasters, coffee makers, and the like, may be incorporated into the microwave oven of the present invention without increasing the size of the microwave oven.
  • a toaster 40 may be arranged at the front portion of the electrical device chamber 31.
  • a toaster body 49 may be arranged within the electrical device chamber 31 and a toaster door 48, for selective opening/closing the toaster 40, may be arranged at a front portion of the toaster body 49.
  • a user In order to operate the microwave oven according to the principles of the present invention, a user must, for example, press button 63a on the operation panel 62. In pressing button 63a, the user is required to apply a force to the operation panel 62. If the door 50 is opened, however, it is difficult to apply a force sufficient to press button 63a and therefore operate the microwave oven. Button 63a, however, may only be pressed with sufficient force when the door 50 is closed. Accordingly, the principles of the present invention may prevent the microwave oven from being operated when the door 50 is opened, either through the user or through a malfunction of a sensing device.
  • connection cable 68 is located between and electrically connects, the control unit 60 and various electrical devices within the electrical device chamber 31.
  • connection cable 68 may be guided along a coupling part of the door 50 and the body of the microwave oven, exposed at a lower part of the microwave oven, and inserted into the base plate 34. Accordingly, a portion of the connection cable 68 may be exposed to the outside at a location between the door 50 and the body of the microwave oven. Being exposed the connection cable 68 may be vulnerable to damage (e.g., breakage).
  • connection cable 68 may electrically connect the substrate 65 of the control unit 60 to substrate 31a, or other various electrical devices, within the electrical device chamber 31 or microwave oven in such a way as to minimize damage it could potentially incur.
  • connection cable 68 may be guided from the substrate 65, through a cut-away portion 50a formed in a bottom surface of the door 50, through a pass-through hole 34s formed in base plate 34, and into the body of the microwave oven.
  • a pass-through hole 34s may be arranged within a side portion of base plate 34 at the same side of the microwave oven as hinge plate 30a.
  • the connection cable 68 may be arranged within the body of the microwave oven in a space defined between the outer case 33 and the cavity assembly 30.
  • connection cable 68 The portion of the connection cable 68 that is exposed between the cut away part 50a in the door 50 and the pass through hole 34s in the base plate 34 may be covered with cover 70.
  • the cover 70 may be hexahedral.
  • the cover 70 may include a side arranged opposite the bottom of the base plate 34 that is open such that cover 70 forms a reception space 71 capable of receiving the connection cable 68.
  • reception space 71 may include at least one holding rib 77 for holding the connecting cable 68.
  • the holding rib 77 may exhibit a ' ⁇ ' form, substantially.
  • the holding ribs 77 may be formed such that fore ends of the holding ribs are alternately extended in opposite directions.
  • a door approach portion 73 extending toward door 50, is provided at one end of cover 70 located at the cut-away part 50a at the bottom of door 50.
  • the cut-away part 50a and the door approach portion 73 are rounded so as to minimize the degree to which the two components interfere with each other when the door 50 is opened and closed.
  • the door approach portion 73 includes a fore end having a connection cable lead-out opening 74.
  • the connection cable lead-out opening 74 has an opened side formed to be in communication with an interior space of the door 50 at the cut-away part 50a.
  • the cover 70 includes a fastening rib 75 formed so as to project into the reception space 71 and be recessed in an exterior surface of the cover 70.
  • Cover 70 may be secured to the base plate 34 by fastening a screw 76 to a fastening hole 34h in the base plate 34 through a fastening hole 75a arranged within fastening rib 75.
  • Legs 80 may be arranged at the bottom surface of, and coupled to, the base plate 34 to form a gap between the microwave oven and the surface on which the microwave oven is arranged.
  • the height of the gap between the microwave oven and the surface may be greater that the height of cover 70.
  • connection cable 68 located between door 50 and base plate 34 may be concealed by the cover 70. Thus, any damage that may be incurred by the portion of the connection cable 68 located between the door 50 and the body of the microwave oven may be minimized.
  • the door 50 includes a door frame 53 and a door panel 55.
  • a metallic frame part 16 forms a frame support structure for the entire door 50.
  • a choke structure 16a may be provided at a rear edge of the metallic frame part 16 to prevent leakage microwaves generated within the cooking chamber 32.
  • a cover 18 may be provided adjacent a rear edge of the choke structure 16a.
  • an opening 53a defined by an inner perimeter contact part 53b extended in front and rear directions, may be formed in an upper central portion of the door frame 53, wherein the door panel 55 is coupled to rear of the opening 53a.
  • a projected part 55a defined by an outer perimeter contact part 55b, may be formed in door panel 55, wherein the projected part 55a may be inserted into the opening 53a of the door frame 53.
  • the door frame 53 and the door panel 55 may be provided substantially as described with reference to Figures 8 and 9 , however, the portions of the door frame 53 and of the door panel 55 that contact each other differ.
  • door panel 55 includes a projected part 55a, defined by the outer perimeter part 55b, to be inserted in the opening 53a of the door frame 53
  • door panel 55 further includes a support part 55c arranged behind the outer perimeter contact part 55b and extended in radial directions.
  • door frame 53 includes an opening 53a defined by the inner perimeter contact part 53b
  • the door frame 53 further includes a contact part 531, provided so as to contact the outer perimeter contact part 55b, and a stepped part 533, provided so as not to contact the door panel 55.
  • contact part 531 has a first length, L1, that is shorter than a second length, L2, of the stepped part 533.
  • a rear end 535 of the inner perimeter contact part 53a contacts the support part 55c of the door panel 55. Accordingly, the rear end 535 contacts the support part 55c and facilitates the door panel 55 to contact the door frame 53.
  • the first length, L1 of contact is shorter than the second length, L2, of no contact. Accordingly, the door frame 53 and the door panel 55 may be assembled after they come into contact over a comparatively short length, L1.
  • the inner perimeter contact part 53b of the door frame and the outer perimeter contact part 55b of the door panel may be brought into contact in over,a,first length, L1. Therefore, assembly of the door frame 53 and the door panel 55 is simple, and any noise caused by contact between the two components after they are assembled may be reduced. Moreover, even if contact area between the two components is reduced, the contact of the rear end 535 with the support part 55c may provide a robust door assembly as the rear end 535 and the support part 55c make close contact even in an assembly state.
  • the door frame 53 and the door panel 55 may be provided substantially as described with reference to Figures 10 and 11 , however, the present embodiment additionally includes a joining rib 90 for coupling of the door frame 53 to the door panel 55.
  • the door panel 55 includes a joining rib 90 projected forward from an outer surface of the support part 55c.
  • the joining rib 90 extends forward from the outside outer perimeter surface 55d and backward from the support part 55c such that a gap is provided from the joining rib 90 to the outer perimeter contact part 55b.
  • a plurality of the joining parts 90 may be provided at predetermined intervals along the entire outer perimeter surface of the projected part 55a.
  • the door assembly of the present embodiment facilitates insertion of the inner perimeter contact part 53b between the joining ribs 90 and the outer perimeter contact part 55b.
  • the inner perimeter contact part 53b is inserted between the outer perimeter contact part 55b and the joining ribs 90.
  • the inner perimeter contact part 53b may be inserted between the joining ribs 90 and the outer perimeter contact part 55b.
  • the assembly of the door frame and door panel may be maintained.
  • the secure coupling of the door frame 53 and the door panel 55 prevents deformation of the door frame 53 or the door panel 55 due to heat generated inside the cooking chamber 32 and relative movement between the door frame 53 and door panel 55.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Electric Ovens (AREA)

Claims (11)

  1. Unité de porte pour un four à micro-ondes, comprenant:
    un châssis de porte (53);
    un panneau de porte (55) agencé à une surface arrière dudit châssis de porte (53); et
    une unité de commande (60) réalisée sur ledit panneau de porte (55), ladite unité de commande (60) étant destinée à commander une opération du four à micro-ondes et comprenant un panneau d'opération (62);
    où une ouverture (53a) est formée dans ledit châssis de porte (53), une portion dudit panneau de porte (55) incluant ledit panneau d'opération (62) est exposée par ladite ouverture (53a) dans ledit châssis de porte (53), ledit panneau de porte (55) comprend une saillie (55a), et ladite saillie (55a) et ladite ouverture (53a) couplent ledit panneau de porte (55) audit châssis de porte (53).
  2. Unité de porte selon la revendication 1, dans laquelle
    ladite ouverture (53a) est définie par une partie de contact de périmètre intérieur (53b); et
    ladite saillie (55a) est définie par une partie de contact de périmètre extérieur (55b).
  3. Unité de porte selon la revendication 2, où ladite partie de contact de périmètre intérieur (53b) s'étend dans les directions avant et arrière.
  4. Unité de porte selon la revendication 3, où ladite partie de contact de périmètre intérieur (53b) comprend:
    une partie de contact (531) pour venir en contact avec ladite partie de contact de périmètre extérieur (55b); et
    une partie étagée (533) à l'arrière de ladite partie de contact (531) pour former un espace avec ladite partie de contact de périmètre extérieur (55b).
  5. Unité de porte selon la revendication 4, où ledit panneau de porte (55) comprend une partie de support saillante (55c) à l'arrière de ladite partie de contact de périmètre extérieur (55b), ladite partie de support saillante (55c) supportant une extrémité arrière de ladite partie étagée (533).
  6. Unité de porte selon l'une quelconque des revendications 2 à 5, où ledit panneau de porte (55) comprend au moins une nervure de jonction (90) pour fixer ladite partie de contact de périmètre intérieur (53b).
  7. Unité de porte selon la revendication 6, où ledit panneau de porte (55) comprend une partie de support (55c) faisant saillie d'une extrémité arrière de ladite partie de contact de périmètre extérieur (55b), ladite au moins une nervure de jonction (90) s'étendant vers l'avant depuis ladite partie de support (55c) de sorte que ladite partie de contact de périmètre intérieur (53b) peut être insérée entre ladite partie de contact de périmètre extérieur (55b) et ladite au moins une nervure de jonction (90).
  8. Unité de porte selon l'une quelconque des revendications 1 à 7, où ladite unité de commande (60) est logée sur un siège (56) réalisé sur le panneau de porte (55), l'unité de commande (60) comprenant ledit panneau d'opération (62) agencé sur une surface frontale du siège (56) et un substrat (65) réalisé sur une surface arrière du siège (56).
  9. Unité de porte selon la revendication 8, comprenant en outre une partie de châssis métallique (16) réalisée à l'arrière du panneau de porte (55), où la partie de châssis métallique (16) comprend une structure d'étranglement (16a) réalisée à la partie de châssis métallique (16) et empêchant une fuite de micro-ondes d'une enceinte de cuisson (32) lorsque l'unité de porte est montée sur le four à micro-ondes.
  10. Unité de porte selon la revendication 9, où le siège (56) est réalisé à l'avant du panneau de porte (55).
  11. Four à micro-ondes, comprenant
    une enceinte de cuisson (32); et
    une unité de porte telle que définie dans l'une quelconque des revendications 1 à 10 pour ouvrir et fermer sélectivement ladite enceinte de cuisson (32), où l'unité de commande (60) réalisée sur ladite unité de porte est destinée à commander un fonctionnement du four à micro-ondes.
EP08153298A 2002-03-11 2002-11-14 Porte pour four à micro-ondes Expired - Fee Related EP1954100B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR1020020013058A KR100807383B1 (ko) 2002-03-11 2002-03-11 컨트롤러를 구비한 전자레인지의 도어장치
KR10-2002-0014212A KR100420353B1 (ko) 2002-03-15 2002-03-15 전자레인지용 도어
KR10-2002-0014210A KR100437404B1 (ko) 2002-03-15 2002-03-15 전자레인지의 컨트롤러 연결선 차폐구조
KR10-2002-0022546A KR100437416B1 (ko) 2002-04-24 2002-04-24 전자레인지용 도어
EP02788959A EP1483940B1 (fr) 2002-03-11 2002-11-14 Four a micro-ondes

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP02788959.1 Division 2002-11-14
EP02788959A Division EP1483940B1 (fr) 2002-03-11 2002-11-14 Four a micro-ondes

Publications (2)

Publication Number Publication Date
EP1954100A1 EP1954100A1 (fr) 2008-08-06
EP1954100B1 true EP1954100B1 (fr) 2011-06-01

Family

ID=27792246

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08153298A Expired - Fee Related EP1954100B1 (fr) 2002-03-11 2002-11-14 Porte pour four à micro-ondes
EP02788959A Expired - Fee Related EP1483940B1 (fr) 2002-03-11 2002-11-14 Four a micro-ondes

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02788959A Expired - Fee Related EP1483940B1 (fr) 2002-03-11 2002-11-14 Four a micro-ondes

Country Status (6)

Country Link
US (2) US6984811B2 (fr)
EP (2) EP1954100B1 (fr)
CN (1) CN100358395C (fr)
AU (1) AU2002353607A1 (fr)
DE (1) DE60235121D1 (fr)
WO (1) WO2003077601A1 (fr)

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AU2002353607A1 (en) 2003-09-22
CN100358395C (zh) 2007-12-26
WO2003077601A1 (fr) 2003-09-18
EP1954100A1 (fr) 2008-08-06
US6984811B2 (en) 2006-01-10
EP1483940A1 (fr) 2004-12-08
EP1483940B1 (fr) 2010-01-13
US7211775B2 (en) 2007-05-01
CN1528106A (zh) 2004-09-08
US20060049191A1 (en) 2006-03-09
US20030168447A1 (en) 2003-09-11

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